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A157934
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Numbers m such that m^2+1 is prime and m^2-7 = prevprime(m^2) (= A007917(m^2)).
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2
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54, 66, 90, 156, 240, 270, 306, 474, 570, 576, 636, 750, 780, 1080, 1320, 1350, 2034, 2154, 2406, 2700, 2760, 3204, 3240, 3306, 3480, 3516, 3756, 3774, 3984, 4056, 4086, 4140, 4146, 4176, 4716, 4734, 4794, 5154, 5370, 5424, 5550, 5664, 5700, 5850, 5856
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[6000], PrimeQ[#^2+1]&&#^2-7==NextPrime[#^2, -1]&] (* Harvey P. Dale, Mar 19 2020 *)
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PROG
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(PARI) forstep(m=2, 9999, 2, isprime(m^2+1) & precprime(m^2)==m^2-7 & print1(m, ", "))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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